vaginal soreness and redness

So i just got check by my doctor and I have no yeast infection, STD's or STI's. In the two weeks since i saw her I have had sex with my also female partner who is as well clean. in the last week I have noticed alot of redness around my vaginal opening. It is also very dry and causing me alot of pain. There is NO itching, NO scent and NO discharge. I have no idea what is wrong or what Im supposed to do. Im wondering if I was allergic to the gloves my doctor wore, the lube she used, maybe my girlfriend scratched me.
What do i do? its causing me much pain.

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